- Steroids and the culture of cheating
She spent years denying the use of performance enhancing drugs, but sprinter Marion Jones now says she did cheat, and has returned the gold medals she won in the 2000 Olympics. While testing methods have improved, athletes keep finding ways to beat the system.9:06 a.m.
Christine Brennan: Sports columnist for USA Today and commentator for NPR, ESPN, and ABC News. She's the author of "Best Seat in the House: A Father, A Daughter, A Journey Through Sports."
Mike Fish: Investigative reporter with ESPN.com.
Aynsley Smith: Sports psychology consultant and research director in the Sports Medicine Center at the Mayo Clinic. She is also the coordinator for the Association of Applied Sports Psychology's 2007 Anti-Doping Congress.
- Uproar over Tutu speech at St. Thomas
The University of St. Thomas in St. Paul caused an uproar with its decision to withdraw a speaking invitation to South African Archbishop Desmond Tutu. School officials decided later Wednesday to invite Tutu after all. We get the perspective of a St. Thomas faculty member.9:48 a.m.
David Landry: Associate professor of religion at St. Thomas University.
- Atrazine, frogs, and public health
His research on the effects of the herbicide atrazine on frogs has generated controversy and earned him enemies. Now Tyrone Hayes is expressing concerns about the link between atrazine and breast and prostate cancer.10:06 a.m.
Tyrone Hayes: Amphibian endocrinologist and professor in the department of integrative biology at the University of California, Berkeley.
You can follow Kerri Miller on Twitter at @KerriMPR
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